Leo, I don't think anything has been done to clear the fault that caused it to stop after it had been run a while, so that fault may come back. On the other hand it may have just been a result of running it on 2 stroke fuel when you first got it, resulting in some blobs of oil floating through the system, one of which lodged in your carburetor's main jet for a while. It could also have been one of many flying chunks of half-burned oil sticking in your spark plug for a while. If it was either of those things that caused it to stop, now that you have run it under load on the correct fuel (straight petrol) for a while, you should have burned away the original problem, and there would be no reason for the problem to recur - it should be back to perfect health. Those old Briggs engines have an excellent reputation for reliability and durability, provided you keep their sumps filled to the correct level with clean oil. It should be changed every 25 or 50 hours' running, depending on operating conditions.
I will close this thread. If anyone needs to post to it, just PM a moderator.
